rush hour
noun [ C usually singular ] uk/ˈrʌʃ ˌaʊər/ us/ˈrʌʃ ˌaʊr/
B2 （上下班）交通高峰时间，交通拥挤时间
the busy part of the day when towns and cities are crowded, either in the morning when people are travelling to work, or in the evening when people are travelling home
rush hour traffic 交通高峰时段的车流